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Description

Specifications

Applications

Downloads

By implementing advanced DSP current control algorithm, Leadshine EM705 is a advanced high performance 2-phase digital stepper drive. It takes step & direction or CW/CCW control commands, and is very simple to implement in OEM applications.

Without an external sensor such as an encoder, the EM705 stepper drive can automatically identify 100% of stall of driven motors at 300 RPM or above, and send fault signals back to motion controller or other devices The EM705 stepper drive also adopts advanced features like electrical damping, anti-resonance, start-up smoothing, multi-stepping... With the input voltage of 20 - 70 VDC and output current of 1.40 - 7.00A, it is capable of driving a wide range of 2-phase stepper motors with high precision at extra smoothness, quietness, and very low motor heating. Its Multi-Stepping feature allows a low resolution step input to produce a much higher microstep output for smoother & quiet motor movement, and much lower motor heating. This will significantly improve the performance of your stepper control systems.

The EM705 stepper drive is easy to setup and configure via DIP switches. There are 15 resolution settings from 400 - 25600, and 7 output current settings from 1.40 - 7.00. Also, a user can simply set the idle current to full (100%) or 50% of the output current via a DIP switch. Its motor auto identification and drive self-configuration feature allows quick and easy setup for various motors at optimal performance.

Leadshine also offers matched stepper motors for the EM705 with their optimized configurations stored in the stepper drive. The user only needs to use the motor rotary switch to select the right motor, and the EM705 will automatically load the pre-setting optimized settings for best performance.

For driving a non-Leadshine stepper motor, a user can use the 'Motor Auto Identification and Configuration' feature of the EM705 to get optimized performance.

For advanced users, Leadshine offers tuning software for performance fine-tuning. The user can tune a stepper motor's three resonance areas (usually around 1 rps, 2 rps, and 4 rps) to reduce noise and vibration, set microstep resolution to any value from 200 to 104,000 (increase by 200), and configure output current to any value of 0.5 - 7.00A (increased by 0.1A); and idle current of 1-100% of output current.

* Pb-Free or CE/UL approved versions optional. Contact Leadshine or see more information in its hardware manual please.

The EM705 has two connectors, connector for control signals connections, and connector for power and motor connections.

Control Signal Connector

Pin

Name

I/O

Description

1

PUL+

I

Pulse signal: This input represents pulse signal, each rising or falling edge active (software configurable, see EM drives software operational manual for more detail); 4-5V when PUL-HIGH, 0-0.5V when PUL-LOW. For reliable response, pulse width should be longer than 10μs. Series connect resistors for current-limiting when +12V or +24V used. The same as DIR and ENA signal.

2

PUL-

I

3

DIR+

I

Direction Signal:This signal has low/high voltage levels, representing two directions of motor rotation. For reliable motion response, DIR signal should be ahead of PUL signal by 5μs at least. 4-5V when DIR-HIGH, 0-0.5V when DIR-LOW. Please note that rotation direction is also related to motor-driver wiring match. Exchanging the connection of two wires for a coil to the driver will reverse motion direction. The direction polarity is software configurable,. See EM drives software operational manual for more detail.

4

DIR-

I

5

ENA+

I

Enable signal: This signal is used for enabling/disabling the driver. In default, high level (NPN control signal) for enabling the driver and low level for disabling the driver. Usually left UNCONNECTED (ENABLED). Please note that PNP and Differential control signals are on the contrary, namely Low level for enabling. The active level of ENA signal is software configurable.See EM drive’s software manual for more detail.

6

ENA-

I

7

FLT+

O

FaultSignal: OC output signal activated when over-voltage, over current and stall-error protection. This port can sink or source 20mA current at 24V. In default, the resistance between FLT+ and FLT- is low impedance in normal operation and become high impedance when EM705 goes into error. The active level of fault signal can be programmable. See EM drives software operational manual for more detail.